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-E.,J. THOMPSONI CARBURETER-l APPLICATION FILED AVPII.2I. 1916.

1,325,126. Patend De.16,1919.

3 SHEETS-SHEFT l.

E. J. THOMPSON.

CARBURETER.

APPLICATION F|LED APH.21. 191e,

l 1,325,126. Y f Patented De@.16,1919.

3 SHEETS-SHEET 2.

Lg l I E4 Egg/123250 E. I. THOMPSON.

CAHBURETER.

APPLICATION FILED APR. 21.1916.

1,325, 126. l Patented Dec. 16, 1919.

3 sHEETs-sHEET 3.

UNITED a sTATEs PATENT oEEioE.

EDMUND JOHN THOMPSON, or OTTAWA, ONTARIO, CANADA CAEBURETER.

specification of Letters Patent.

Application iiled April 21, 1916. Serial No. 92,672.

To all wwm t may concern: Be it known that I, EDMUND JOHN THOMPSON, a .subject of the King of Great.

Britain, and resident of the city of Ottawa,

Province of Ontario, Dominion of Canada,

' of air supply. The objects of the invention are to enable the proportions of air and 'combustible iiuid to be always maintained constant in the varying volumes demanded by the en ne, and also to enable the' can increasingjthe suction stroke pressure on and-accompanying drawings forming part bureter to e simply and effectively adjusted to suit the requirement of a particular engine whereby it will operate with uniform eliciency. at all speeds. Further objects are to providel a carbureter which will work under. a comparatively low vacuum, thus the engine and insuring that the full charge `is given'to the cylinders at allA speeds.

In carrying out these objects, means areprovided for adjusting the amount of open-l ing of the valve fora given speed ,'and also for adjusting the rate at which the air valve will open and close the voil valve to correspond with the change in the speed of the engine. r' v With the aboveand other objects in view, the invention consists essentially of the improved construction particularly 'described- Iand set. forth inl the following specification of the same. 4

In the drawings, Figure 1l is a 'vertical section through thel improved carburetor.

Fig. 2 isa side elevation of the same. Fig. 3 is a perspective view of the suction valve.

Fig. 4 isla vertical section of the suction valve, v

Fig. 5 is a transverse section of 'the suction valve on the line 3-.3 of Fig. 4.

Fig. 6 is a vertical section through a modified. form of the improved carbureter.A type; the head 25, when the valve member 110 Fig. 7 -is a side elevation, partly sectional, of the same. i 4

Fig. 8 is a side elevation of the carbureter shown in Fig. 6.

Fig. 9 is a perspective view of the connecting means between the suction valve and `thevalve for the spray nozzle.

Fig. 10-is a sectional detail of the inclined ,pla-ne designed to operate the valve -in the spray nozzle. 4

Fig. ll'is a sectional elevation of the contact member engaging theinclined plane.

Like characters of reference refer to like parts in the several vfigures.

Referring to the drawings, A representsl the outer casing shell of suitable shape to contain they working parts, the upper part of which is provided with a tubular outlet neck 10 having a flange 11 to' connect with the intake pipe, of an engine, the passage through the neck being controlled by a.but`

. terfly valve 12.

Mounted within the casing member and verticallyreciprocating thereinis a suction valve member B formed with a'tubular portion 13 which'i'ts the neck 1'0and a'lower conoidal portion 14 provided with an in- Patented Dec. 16, 1919..-

tegral pinion 15 on the' lower end' thereof adapted to mesh with the pinion 16 rigidly mounted on the spindle 17- rotatably sup-l ported by the casing A. y

This spindle 17 is held in an adjusted position by a'set screw 18' making threaded engagement with the casing A and is further provided on the uppereud with a .milled head 19by means of'whieh the vsaid l -spindle may be manually rotated. The pin'ion 15 is forme-d lintegral with the lower conoidal portion 14. of the suction valve B and is provided with a pair of curvilinear slots or ports 20 through which air 'isdesigned to pass in a manner to'be made clear l. hereafter.

.The movement-of the suction valve by the 1 suction of the engine is effected through the medium of the piston 21 formed on the exterior ofthe neck 13 and fitting closely to *the cylinder '22 formed in the casing, 'the upper portion of which forms an air cham'- ber 23 which is placed in communication with .the suction of the engine through the medium of the small port-24 1n the neck 13. A spray nozzle C' 1s mounted within the valve member B andis of the mushroom 27 which leads to a4 constant level supply chamber D.

The bottom of the' chamber is slightly above thedischarge passageway 26 .and is supplied through an inlet passage 28 controlled by a valve 29 which is operated -'by a oat 30 mounted within the chamber D. This float is designed to always maintain a const'ant'head of combustible iuid on the spray nozzle.

To permit access cated directly below the valve 29 thereby affording facilities for inspection of the said valve should such be found necessary- The combustible fluid Lis delivered from the chamber D through the passageways 32 and 33 to the supply passageway 27 access to the last of which passageways is gainedA through a removable plug 34. This supply passageway houses a valve spindle 35 having a tapered lower end -designed to.control the supply of Jr'uel to be mixed with a proportionate' quantity of air, the spindle being provided intermediate of its length with an'enlargement 36 slidably engagingthe supply passageway 27 and carrying a key-way 37 adapted to engage with a feather 38 on the upper end of the spray nozzle C, the upperend of this spindle being threaded as shown at 39, so facilitating in the raising and lowering of the spindle l to 'obtain the desired mixture.

The upperl end of the spindle makes threaded engagement with. an adjusting' member 40 carrying upper and lower en flanges and provided with a body portion substantially square which is adapted toslidably engage with the orifice 41 provided in the spider 42 extending across the upper end of the neck 13, the said member being l heldin adjustable position by the spring 42a surrounding the body portion and 1o cated between the lower flange and the spider 42, which spring tends to provide'the requisite pressure to seat the valve spindle in the seating provided in the supply passa eway27.'l .i

he taper Dof the valve spindle 35 relatively to the taper of the suction valve B and spray nozzle C is such that the quantities of fuel and air are always in the same proportions, and any displacement of the several elements enunerated only permits the volume to vary while the proportions remain constant.

. The lower portion of the casing A is in-l closed by a removable cover 43 provided with an inlet conduit`44 through whichy air is designed to be delivered, the conduit carupper-of which'engages the lower face of the pinion 15 while the lower engages with the shorter arm of the bell crank 47 pivotally mounted on the cover 43 and designed Y' v to be actuated bythe link member 48 simulto the passageway 28, a'v removable plug 31 is provided, which is lotaneously with the butterflyA valve 45.

InFigs. G to' 11. an alternative) form of the invention is shown which differs from that already described in that the supply passageway 27 of the spray nozzle C exv` tends to the top thereof and is provided with a conical valve seat with which the valve E engages. This valve. is operativelyr connected to the upper arm of the angle spindle 49, the lower end of which is provided with an enlarged headl 50 having' a groove 51 therein designed to engage with the crank arm 52 rigidly mounted' on the lower arm of the crank member 53. The upper end of the crank member 53 is bifurcated-and emv By adjusting the nut 54, theispindle 54a -will be moved longitudinally so that the spherical end 55 will engage the inclined plane 56 at an earlier or later period of the displacement of the suction valve B, so that the angular displacement of the crank meinJ ber 53 is adjustedto permit of the rod 49 being'moved upwardly to a greater extent and thus open'the valve E to permit of more ways 26. Y L

The inclined plane 56 carries a piece of metal 58 inserted therein, which is glass hard and adaptedto engage with the ball end 55 of the spindle 54 so that the wearon the working parts of the carbureten is therelby minimized. This-inclined plane is furfluid being discharged through the passage- Y 'required degree.

inclosed bya' removable cover 43a which .is

similar to that described with reference to Figs. l and 2, being provided with the air inlet conduit 442L in which the butteriiy valve a 4is operatively mounted, the said butteriiy valve being held normally'open under the action of the spring '.46a1or the like.

The projection 5 7 is falso inclosed by an auxiliary casing 65a which is provided on its lower end `With dowel pins adapted to.

engage with the removable cover 43 whichl carries -a pivotally mounted resilient catch memberV 66 provided with a detent .67 on its free end designed 'to engage with a depression in the face of the casing 65a.

The piston 21 carried by the suction valve B'is,- however,'in this case provided with an annular groove in the upper 'face thereof into which molten metal may be poured, so

facilitating in balancing the `valve to the In the operation ofthe carbureter the bell crank 47 is operated 'so thatthe-plunger- 46 elevates the suction valve B, andsimultaneous'ly with this operation the butterfly `valve 45 is closed so-that when the engine is started an undiluted charge of vgasolene or other motive fluid is delivered through the radial orifices 26 to the tubular portions radial 13 from whence it passes through the neck 10 into the engine.

When the engine has `on ce, 1been started the crank member 47'ret11rns under gravity to its .normal position, whilethe jbutteriiy valve 45 is opened under the action of a spring or like member and the 'air after passing through the conduit 44' passes through the suction valve B where it intermixes with the fuel discharged from the passageways 26, the mixture passing through the tubular portion 13 into the neck 10 and being delivered to the engine.

l It ,will be clear`thata portion of the air willpass through the ports 20 Vand acting fon-the under face of the piston 2l will cause the suction valve B to remain floating,`and this it will be understood is also -brought about owing to the fact that the chamber 23 located above the piston, 21 is -in communication with the suction stroke of the engine 'so that a partial vacuum is formed in the said 'chamber and there isno resistance to the upward motion of the suction valve. A

The `valve spindle 35 may be adjusted through the medium of thepinion 16 which tion 58 of the inclined so thata maximum of from the same.

conoidal meshes with lthel pinion Wheel 15 on the suc- .tion valve B, thereby rotating thevsame, and

.during -this operation the threadedportion '39 of the said spindle will be adjusted relatively to the adjusting member 40 located atthe upper portion ofthe tubular portion 13.

When .the carbureter .shown in Figs. 6' and 7 1s 1n use the motlve fluid passes from the supply chamber D through the passagelways 32 and 33 into thc supply passageway 27 from whence it passes through the radial passagewaysl 26- and is delivered to theA interior of the'suction lvalve.

When an engine tted with this carbureter is being started, the butterliy valve 45a' is closed so thatan undiluted charge of gaso- .le ne or motive fluid fis delivered to the en- Avalve B tends to keep the same ioating,'and

it-will be clear that since the ball point 55 of the spindle 54 engages with the inset porplane 56 the valve E on the upper end of the'spray noz'zle C is automatically controlled so that the amount of gasolene delivered through the radial passageway 26 will be of a predetermined amount required by the engine.

From.this description it will be 'seen that I have 4invented a carbureter wherein the suction valve controlling the suppl-y of fuel to the engine is automatically controlled by the suction of the engine, so that a predetermined quantity of fuel, requisite for the purposes required, is delivered to the engine Y efficiency is obtained As many changes could be made in they above construction and many apparently widely different embodiments of my inven` tion, within the scope of the claims, constructed without departing from the spirit or scope thereof it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim as my invention isz,

l. A carbureter of the class described, comprising a casing, a iioating. land automatically actuated suction ,valve slidably mounted in the casing provided with a lower 125 portion carrying a pinion, a manually operated pinion meshing with the said pinion, a spray nozzle-located in the suction valve, aY valve coacting .With the suction valve, threaded means connecting the' last 180 said valve, to the suction valve and means preventing the last said valve from turning with the suction valve as and for then purpose specified. y

2. A carbureter of the class' described', comprising a casing, a floating and automatically controlled suction valve operatin in the casing and provided intermediate o its length with a piston slidably engaging the inner periphery of the casing, a pinion integral with the lower end of the suction valve provided With ports, a manually'operated pinion meshing With the said pinion, a spray nozzle located in the suction valve, a

vvalvecoactingg with the yspray nozzle adapt- 15 ed to control the How of convertible fluid therethrough, adj ustable threaded means operatively connecting the last said valve to thesuction valve whereby on the actuation of the suction valve, the said valve is oper- 20 ated and means preventing the last said valve from turning with the suction valve.

In Witness whereof I havehereunto set my hand in the presence of two Witnesses.

' EDMUND JOHN THOMPSON. Witnesses:-

JAMES MITCHELL, Rf B. SMART. 

